Drift valve



F. BALL DRIFT VALVE Filgad May 22 1925 v My prese it invent'ionerelatesto irr p'roize;

3 ,Ihents in drift valvee'design'ed especially for' iu sej iippnrailway:steam -lbcomotives as an a uxilier'y'" appliance fo gadmittingtol-thefcyi- '5 indei' sfand va1ve ehemhe1e a supply 915 steam 1,

'yja'lves; therein; t6 Whichthe' Steam fOi: Qpe "mg the engine iesupplied through th me;

i fefjl ibi'iezit'ing' and maintaining the parts, V v heated eqnditio i'whennthe normal eiipplyof k iowxi, during the, time the -10'c16m'otiveV is 11 110 drifting of cezisting;withthe main steam sup ply Gut ofi';the'ebsenceof thesteempermits v '1' the'parts to become dry. andtheedihi'ssionof air tejthe interior parts of; the cylinders" andchambers 0001's the walls, thus creatinglan un;vjidlesirelole,eo'nditiexi"and impairing the eifieietiey ef thelocomotive l The p imary obj e'ct ofzmyinyention islthe provision f-ana'ppii tean cqntinuously Operating at arid above eelid yetmaintaintheeylinclersychembers' and operating parts in workin eonditibn fol" 2?"greatest eflicieneyf 'lhe 'applianceis'applifcablefer ,use incoimectien- With locomotives "(now in use without};necessity-formaterial I of thefdi'iye heel,axlesthrough'e speedggov (g 1 1 1 willhereiheftei be more fully point ediout andpl iiiied, j'Inithejaeeinnpanying tifated one completef exempleef the physical j.embodiment pf, invention fWhei'ei the parts arecombined and arramgeelaccQrding to-thejbe'st mode 'I'have thus far deyi' sed for fm n nt qnaFl .Y i wafy steam; locomotive r-havmg the appliance partsq: .j j 1fFi'gu 'e fitheyd iftgvaiv' in; elosedipositionl j I Figure is a vi ewin sideieleyetiop" i appliance.

j steamitQ-thfe eylin'der'sie eutjoffili Aspi e Well; I p fOlliltEliIl41' for auxilierypurpo ses isflo ait d;

"'der W anpe fefjsupplyihg ah. auxiliary supply efj I [Wit njthe cyliderfeaemgfifwhiehi hfminimflmspeedX say seven miles per'houp) of.'.the'"l'o cometiv'e, iri orcier that" the main stezi m" supply maybeiclitpfi when desirable;

aehang-e and is operated,- preferably from one:

i h V I "P dnziwings llheve illuSQ p p I ta-ry ports 1416mm slide. V yeWhen th a of my invention ir stzilled ithereoh a ndfindlig eatingth?) ergeme t end "assemh ly; o f

Q'i i aitop p n viewdfthe awning i 4 ,;.Figure 3;-is' 'ivertiealseetional iew with "Figure 1/ '5 risa, transverse sectibi elfyiew [at Inorder th at th'efigeriel al arrangement; an relation ifpartsmayreadilybe understo'c')" have iridieated in Figuie lthepertsltdbeilu bricat'ed andfheated' a se cylinder 1 andv sta'nrr ehest 2with" thefusu a1 1 ep'ereting pieteii 511 stea'n'if line; 01 pipe 3?;The] Usualitiirrt in th'eeibbf the locomotive and the-auxiliary W isupply of steamlfp -the appliafiCeiisjMke j therefrom th'lf ojigh thepipettethecylifide it cztsing fifgri th -lubricating pipe? istqng neted: a, afsiuteble place Ptbih main Supply 5 pipe 3 enduetstealm teth eChest ell 15Lcylini-v '5 1 n the'jinain supplyiseiit-nofies:Well v I"afs'f dufihglthe'time ';that* the=* locomotive s' traveli" gabove aminimumspeed. i

bf thefleeoinetivegfeac erj'exceeds determined spd as seveii miles I e ei ipl l e ep The c ylindef casing and slide fira'lfie fperte dupengayoke lfi isindle fiar ged hea interpb sed Ebetw eeiilth e yoke; and the;eyhpgler easing KWith; I fastening a -bolts fbrjrigid e; r eth weer, he;'T wyo evs plate 17 for-"ettachihg t a; I

' leeie iegi -tyith a base suitable 1 s'upppi'tiiiglmembei i ef the ,lit

its interior side by the innersteam cylinder v a an equalized pressurein 1 a As shown in Figure 3 I =The'valve stem 18 isrigidly secured tothe lower head of thevalve as by screw threads and is provided with a.stufling box orrslide bearing 19 in the cylinder head 16 or plateinterposed between the yoke and, cyllnder casing. Smalldrain ports20,and 21 are provided in the head 16 and the valve head respectively todrain excess steam and maintain the hollovv p ston and cylinder casing.l" H v V the drift valve' is closed, eta is opened by the action of .acentrifugalatype of. speed governor indicated as a Whole by the numerals22 and connecting the valve'sten 18 With the ,eomplementary,telescoping, tubular shaft 22 of the governor, Which shaft isjou-rnalfed at 2 on the attacho ing or base plate 17.

' A bevelpinio'n 25 on the tubular shaft'23' and a complementary pinion26 on the pulley-1 v shaft 27 jeurnaled in bearings ofthe yoke 15transmit motion from the pulley shaft'tothe actuating part elf-thegovernor to extend" the balls, pull down the stem and its drift valveand" cause the ports 14 and 12 to, register, p v A pulley 28 is carriedon the pulley-shaft 27 and belt29- from the drive-pulley 3O (dottedlines Figure 1) on an axle'of the loeomotive is used-to operate thegovernor at and-ab ve a minimum speed to be predetermined. V v is 'Whenthe driftlvalvefis lowered to cause Letters Patent is again appliedimmediately become eflective for eflicientuse; 7

When the speedof the locomotive falls helou the redetermined minimumrate the The'jcombination with a o closed-icylinder casing having aradial inlet port, of an inner cylinder forming anannular space Withinthe casing, said inner cylinder having an end port and a. radial port, acylindrical valve reciprocable in said space, said; valve having oneclosed end and "a radial port, the latter for coaction'withthecomplementary port of the cylinder, a stem at the closedend of thevalve, and governor mechanism connected with the stemjtor operating thevalve.

- In testimo'n'ynvhereof I' allix my signature. FRED BALL.

the ports 14 and 12 to register ititvill heap 7' i 7' parent that steamentering the annular. steam space 8 through the port 9from pipe 5,passes throughthe registering ports totheinteri or l of the innercylinder 11, 'thenceupward'ly through the-outlet port 10 and pipei7 tothe main steam, pipe is traveling at the predetermined minimum Ispeedorat a speed in excess of this minimum a high speed.

speed the valve is retainedin open position. As thefspeed 01 thelocomotivejinereases the valve stem isdratvn down into. the tubulargovernor shaft 23; Which is "providedfvvith drain port 23 to permit'exitof- Water or other'extraneousmatter', and a bearing-hall 31 is alsolocated at the lower end of the "tubular portion oft-he shaft23'to-perform the functions of a thrust bearing for-the'lovver I end ofthestem 18' when the governor reaches Thus vvith Vvlhile the locomotivev r 1 the appliance supplying eco tinuousfan'd' automatically controlledauxildri' quantity-of steam to the mainsteam' pipes and cylinders andother parts of the op- V Crating mechanism of the locomotive 'as -deifscr bed the locomotivemay .be permitted to 7 t tar-coast when the mainsupply of steam is cut ofi' and; the parts are lubrieated andf orderthat the maintained at; normal Working condition in main supply; ofisteainj when ios

